# Classifications of Triangles

Views:

Category: Education

## Presentation Description

No description available.

By: boomboom99 (31 month(s) ago)

awesome

## Presentation Transcript

### ClassificationofTriangles :

ClassificationofTriangles

Table of Contents Objective Review Definition of a Triangle Samples of Triangular Objects Types of angles Congruence of Line Segments According to Angle Measure According to Length of sides Review Questions

### Objective: :

Objective: At the end of the lesson, the students should be able to classify triangles.

REVIEW

### Triangle :

Triangle It is a three sided polygon. A B C AC AB BC

### Samples of Triangles that can be seen around us. :

Samples of Triangles that can be seen around us.

TYPES OF ANGLES

### Slide 8:

Acute Angle -It is an angle whose measure is less than 900. 300 A B C <BAC which is an acute angle.

### Right Angle :

Right Angle -It is an angle whose measure is equal to 900. 900

### Obtuse Angle :

Obtuse Angle - It is an angle whose measure is greater than 900 but less than 1800. 1500

### How can we say that two segments are Congruent ? :

How can we say that two segments are Congruent ?

### Slide 12:

*Two segments are congruent if and only if they have equal length. C D 10 cm 10 cm measure of AB = measure of CD A B

### CLASSIFICATION OF TRIANGLES :

CLASSIFICATION OF TRIANGLES According to angles According to sides

### Slide 14:

TRIANGLES ACCORDING TO THERE ANGLES

### *ACUTE TRIANGLE :

600 48O *ACUTE TRIANGLE -All the angles of the triangle are acute. J L K 720 <J,<K,<L are all acute angles.

### RIGHT TRIANGLE :

RIGHT TRIANGLE -An angle in a triangle is a right angle. 900 M O N <M is a right angle. leg leg The side opposite the right angle of a right triangle is called the hypotenuse. The other sides are called legs. HYPOTENUSE

### OBTUSE TRIANGLE :

OBTUSE TRIANGLE - An angle in a triangle is an obtuse angle. P Q 1280 <P is an obtuse angle. R

### Slide 18:

Triangles According to there sides

### SCALENE TRIANGLE :

SCALENE TRIANGLE -No two sides are congruent. A B AB = BC = CA 4 cm 6 cm C 9 cm ~ ~

### ISOSCELES TRIANGLE :

D F ISOSCELES TRIANGLE -two sides of the are congruent. E DE = FE base leg leg The two equal sides of an isosceles triangle are called legs. The third side is called the base. ~

### EQUILATERAL TRIANGLE :

EQUILATERAL TRIANGLE -Three sides are congruent. G I H GH = HI = GI ~ ~

### Slide 22:

Reported to: Salvador Salazar Reported by: Jeremy Javier Mr. THE END!!!